Merge branch 'next'; Fix for #93.

lib/openbel/api/evidence/mongo.rb

@@ -33,11 +33,7 @@ def initialize(options = {})
           {:"$**" => Mongo::TEXT },
           :background => true
         )
-        @evidence_facets = EvidenceFacets.new(
-          :host     => host,
-          :port     => port,
-          :database => db
-        )
+        @evidence_facets = EvidenceFacets.new(options)
       end
 
       def create_evidence(evidence)

lib/openbel/api/evidence/mongo_facet.rb

@@ -12,10 +12,19 @@ class EvidenceFacets
       include FacetFilter
 
       def initialize(options = {})
-        host             = options.delete(:host)
-        port             = options.delete(:port)
-        db               = options.delete(:database)
+        host             = options[:host]
+        port             = options[:port]
+        db               = options[:database]
         @db              = MongoClient.new(host, port).db(db)
+
+        # Authenticate user if provided.
+        username = options[:username]
+        password = options[:password]
+        if username && password
+          auth_db = options[:authentication_database] || db
+          @db.authenticate(username, password, nil, auth_db)
+        end
+
         @evidence        = @db[:evidence]
         @evidence_facets = @db[:evidence_facets]
       end